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A Search for a Distant Companion to the Sun with the Wide-field Infrared Survey Explorer

  • Authors: K. L. Luhman

Luhman 2014 The Astrophysical Journal 781 4.

  • Provider: AAS Journals

Caption: Figure 1.

Color–color diagrams for new high proper motion candidates (μ/σ μ > 5) detected with multi-epoch astrometry from WISE. In each diagram, the colors in the group near the origin are consistent with those of main-sequence stars and brown dwarfs; all of these candidates have detections in 2MASS that confirm their large motions. Most of the objects in the redder group are probably galaxies or evolved stars; none have motions confirmed by 2MASS. For reference, the left diagram includes the colors produced by fits to absolute magnitudes of L and T dwarfs (solid and dashed curves, Dupuy & Liu 2012) and a boundary below which Kirkpatrick et al. (2011) selected candidate T and Y dwarfs (solid line). The candidate that is between the two groups in the right diagram is the binary brown dwarf WISE 1049−5319 (Luhman 2013).

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